To be an excellent runner, you must be prepared to _______ much hard work.
According to the weather forecast, it will be _____weather that we had better stay at home.
He had to take the medicine 3 times a day to be _______ the pain in the leg.
Whenever he was asked why he was late for class,he would answer carelessly,______ the same thing.
He is the most suitable person _______the task.
_________, the experiment is sure to succeed.